Handle invalid URIs in summaries.

pkg/analyzer/test/src/summary/resynthesize_common.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library test.src.serialization.elements_test;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/standard_resolution_map.dart';
 import 'package:analyzer/dart/constant/value.dart';
 import 'package:analyzer/dart/element/element.dart';
@@ skipping 3899 matching lines @@
   }
 
   test_invalid_setterParameter_fieldFormalParameter_self() {
     checkLibrary('''
 class C {
   set x(this.x) {}
 }
 ''');
   }
 
+  test_invalidUris() {
+    allowMissingFiles = true;
+    checkLibrary(r'''
+import '[invalid uri]';
+import '[invalid uri]:foo.dart';
+import 'a1.dart';
+import '[invalid uri]';
+import '[invalid uri]:foo.dart';
+
+export '[invalid uri]';
+export '[invalid uri]:foo.dart';
+export 'a2.dart';
+export '[invalid uri]';
+export '[invalid uri]:foo.dart';
+
+part '[invalid uri]';
+part 'a3.dart';
+part '[invalid uri]';
+''');
+  }
+
   test_library() {
     checkLibrary('');
   }
 
   test_library_documented() {
     checkLibrary('''
 // Extra comment so doc comment offset != 0
 /**
  * Docs
  */
@@ skipping 1204 matching lines @@
       fail('Unexpectedly tried to get unlinked summary for $uri');
     }
     return serializedUnit;
   }
 
   @override
   bool hasLibrarySummary(String uri) {
     return true;
   }
 }